Piston.



E. TALBOT.

I PISTON.

APPLICATION FILED AUG. 27 1,910.

I ,m 1 I5 10 T ii 1 I g \Y I i! m I I H \W it? 19 i M WITNESSES"INVENTUR Arm/" 78 Patented Nov. 8, 1910.

- the-line 2-2 of Fig.1.

h under s! combustion engines.

.ence indicate ct'irrsponding parts in both the in accordance with myiston of two separate pieces or sections rig 'ldly connected together,althou h ,the two, sections may be formed: integral One of-these membershas a substantially fiat face or circular portion 10, constituting'thedsiidnumber of grooves or channels. 12 .for the reception of 'packilnfi.ri The othermemberhas a substant' 1y cy' ,drical extendin ERNESTTALBOT, OF NEW YORK, N. Y.

PISTON.

Specification 01 Letters Yatent.

Patented Nov, 8, 1910.

Application filed August 27, 1910. Serial no. 579,251.

To all whom it may concern:

Be it known that I, Enn'ns'r T Annor, a subject of the King of GreatBritain, and. a resident of the cityof New. York, borou h of Manhattan,in the county and State o New York, have invented a new and ImprovedPiston, of which the following is a full, clear, and exact description.i

This invention relates to certain improvements in istons, and moreparticularly to pistons a apted for use in light internal The objectof-my invention is to rovidc' a construction of very small Weig ity andgreat rigidity, with provision for easily seecuring-1g piston pin ofsmall diameter. Incidentally, the bea' ring forthe piston pin is'removed to a considerable distance from the hot cylinder .Walls.

In myim iroved piston, I emplo a cap portion whic takes the presso relancarries the piston rings, and a trunk portion attached to the capportion and carrying the piston pin brackets in the form of lugsroecting outwardly from the, trunk. he trunk may, if desired, havenskirt portion attached thereto,to a'ct as a guide forthe' lower endof the piston.

' Referencg sto be h'ad to the accompany ing drawings, forniin -a art ofthis specificatiom'in which simi ar 0 aracters of referfigares, and inwhich "Figure 1 is a side elevationof a'piston inventioiignnd Fig. :2 isa longitudinal section on In my improved construction, I form theif:desired.

head of the piston, and-at the periphery of this face is an annularskirt or flange 11, in the outer surface of which are formed any trunkor .body rtion 13, considerably smaller. than-the ange 11 of the pistonand concentric with the latter to the e1ofthe-head; The trunk may besecured to the, head in an suitable manner, but isipreferably ,provi edwith snoutskirt or fiangle portion 11.

diameter of the piston,

wardly extending- Qannular flange 14, which may .be held by welding orby rivets-'15.

The head may have a dcpcmling flange 16 on its under side for engagementwith the periphery of thisflange 14:, so as to hold the two parts of thepiston coi'n'zcntric. The

', trunlc13, at its lower end, has an tmtwardly and referablydownwawily-extending conical. nge 1-7, and at the outer and lower edgeof-thisflange is a cylindrical "skirt portion 18 of the same exteriordiameter as the Both the portions 11 and 18 engage with the innersurface of the engine cylinder, but the two are spaced a considerabledistance apart. In-, termediate its ends, the trunk 13 provided withoppositely-disposed outwardly-extend ing annular bosses 19, adaptedto-receive the ordinary piston pin. place may be held againstlongitudinal rnoveinentby a fastening member extending through asuitable opening 20in one of the bosses.

In my improved piston, thc'trunk 13 preferably iz-i of approximatelyone-half the the piston is supported on the upper end of the trunk andmidway between the cen ter of the face and the periphery of the latter.Thus, the strain upon the face equally distributed. The bosses 19 may bemade considerably shorter than those commonly. employed in pistons, andthe piston The pin when in,

so that the-face of pin may also be made shorter. T hisreduces theweight ofthe piston'withont materially reducing the strength. The flange18 being of the samedia'rnctcr as the-flange 11, holds the pistonagainst any compression or sheering strainon either flange, and addsstrength to the piston. The air'chamber encircling the trunk portion andthe air chamber within the trunk portion, tendto keep the piston in a'cool condition. The two z -ctions may be formed of pressed steel,or,.ii desired, they might be forl'ncd of separate castings, or thepiston may he made as a one-piece casting or one-piece stamping.

Having thus described my invention, I claim as new and desire tosccureby Letters Patent:

1. A piston having a tubular body portion, a head secured to and'closingone end of the tubular body portion, having a piston ring flangesurroundin and relativelv larger than the tubular body portion andforming in connection with the said tubular body portion, a cooling(ihar'nher, and piston -therein' from around and. about the and againstthe inner wall tn,-a head secured ring of the tubular body flangesurronndin" larger than the tubulali i0 forming in connection with bodyportion, .a.co.oling chamber, and'afskirt secured to theopposite'end-ofthe tubular portion .a nd of approximately the ely open at the innerside,'

same diameter as the piston ring flange, the

tubular thereof and terminating short of the said flange and skirt, thesaid cooling chamber open at itsinner side and in free communicationwith theepace externally of the tubular body between the flange andskirt, and with the inner wall of the cylinder. in which the-piston isplaced.

In testimony whereof'I have signed my body portion having piston pinboseee extending from the opposite sides name to this specification inthe presence "of "two subscribing witnesses.

ERNEST TALBOT. Witnesses:

C.. W. FAIRBANK,

PHILIP D. .RoLLHAUe.

